Digihome (Vestel) LED Backlighting Problem

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

Understood, thanks, will do.

One last question (for now): lots of LED strips for sale on eBay. They mostly all look the same but I've no idea if they are. Eg will any Vestel LED strip work with my telly, or should I seek advice?

[ReeceyBurger123]

Re: Digihome (Vestel) LED Backlighting Problem

You can use any D type Led strip, what method you planning on using or you replacing the whole strip ?

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

Was planning to use the "stacking" method to replace the individual LEDs - having watched you do it in the YouTube video it seems reasonably straightforward.

[flocko]

Re: Digihome (Vestel) LED Backlighting Problem

eBay item number:252492958756 Vestal type D

[budm]

Re: Digihome (Vestel) LED Backlighting Problem

I search the EBAY Item number '252492958756' but nothing comes up.

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

I search the EBAY Item number '252492958756' but nothing comes up.

http://www.ebay.co.uk/itm/252492958756

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

eBay item number:252492958756 Vestal type D

Thank you once again. Just ordered some. Think I'm done for today. Will wait for postie to bring my stuff and then get cracking.

[budm]

Re: Digihome (Vestel) LED Backlighting Problem

Thanks.
I put the numbers in the search box item number but nothing comes up. May be it has to be 'UK' only.
OK, I had to put the search the 'http://www.ebay.co.uk/' and then it shows up. I also try 'Worldwide' that did not work either.

[ReeceyBurger123]

Re: Digihome (Vestel) LED Backlighting Problem

Thanks.
I put the numbers in the search box item number but nothing comes up. May be it has to be 'UK' only.

Yeah its because yous is Uk and that number is for Uk listings only.

[ReeceyBurger123]

Re: Digihome (Vestel) LED Backlighting Problem

Also £12 flocky ?

[dick_barton]

Re: Digihome (Vestel) LED Backlighting Problem

Also £12 flocky ?

I believe that's for 3 off.

[flocko]

Re: Digihome (Vestel) LED Backlighting Problem

Listing is for three new LEDs with six lens types to choose from. Freepost to UK extra £4.00 postage to EU

[ReeceyBurger123]

Re: Digihome (Vestel) LED Backlighting Problem

Ahh I see you can buy a new Tv for that price ! Haha just messin thats fair

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

I'm still unsure about my situation.

Even for those LED strips that are malfunctioning on my TV (the 1st, the 2nd and half the 3rd), the voltage gets through to them absolutely fine - it marries up perfectly with the voltages that appear at other points on the circuit boards at the top. No sign at all of any broken connections.

Something has changed though. The voltages I was seeing the other day for the 3 leads from the PSU were:

28V red, 28V brown, 72V black

==============

Today when I checked this morning I was getting

38V red, 35V brown, 77V black

That's the steady state position though. On first turning the set on, red and brown voltages are close to zero but climb quickly for a few seconds. When the red voltage gets past about 20V, the LEDs in the malfunctioning strips (1st, 2nd, half the 3rd) go out, all at the same time.

==============

And just now I've checked again and in a steady state I'm getting

0V red, 35V brown, 77V black.

And the LEDs in the malfunctioning strips - which were dark last week - are just very slightly illuminated.

========

I'm still not sure that this isn't a PSU playing up. I can't find any faults anywhere else.

[CapLeaker]

Re: Digihome (Vestel) LED Backlighting Problem

LEDs work on constant current, not on constant voltage.

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

Understood - hence the voltages from the PSU vary a little bit from time to time. I still don't know what the fault is with my set though. Very confused.

[CapLeaker]

Re: Digihome (Vestel) LED Backlighting Problem

LED's breaking down?

[ReeceyBurger123]

Re: Digihome (Vestel) LED Backlighting Problem

Doubt its the Leds, you done what I said yet by bridging over them connectors ?

[CapLeaker]

Re: Digihome (Vestel) LED Backlighting Problem

What is the condensed version story of this tv?

[bigalxyz]

Re: Digihome (Vestel) LED Backlighting Problem

Doubt its the Leds, you done what I said yet by bridging over them connectors ?

Not yet because I spent some time this morning checking the voltages at various points, and the voltages from the PSU are getting through to the LED strips perfectly.

And yet half the LEDs don't light up. Sometimes they light up nice & bright when you first switch the TV on and then go out after a few seconds, but usually they stay dark.

The other half of the LEDs work ok (save for a couple of dead individual bulbs which I've ordered the replacements for).

I can't make sense of it.